Operating Segments (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Total revenue from external customers		$ 2,598	$ 2,747	$ 5,519	$ 6,156
Net income attributable to Dominion		452	413	976	949
DVP
Segment Reporting Information [Line Items]
Total revenue from external customers		518	505	1,079	1,074
Dominion Generation
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	1,566	1,658	3,262	3,650
Dominion Energy
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	515	578	1,178	1,424
Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers		136	148	331	277
Operating Segments | DVP
Segment Reporting Information [Line Items]
Total revenue from external customers		512	500	1,068	1,064
Net income attributable to Dominion		104	117	224	257
Operating Segments | Dominion Generation
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	1,564	1,652	3,257	3,641
Net income attributable to Dominion	[1]	171	250	416	512
Operating Segments | Dominion Energy
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	391	463	876	999
Net income attributable to Dominion	[1]	162	129	348	356
Operating Segments | Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers		3	4	6	(9)
Net income attributable to Dominion		15	(83)	(12)	(176)
Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	(265)	(270)	(643)	(730)
Intersegment revenue | DVP
Segment Reporting Information [Line Items]
Total revenue from external customers		6	5	11	10
Intersegment revenue | Dominion Generation
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	2	6	5	9
Intersegment revenue | Dominion Energy
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	124	115	302	425
Intersegment revenue | Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers		133	144	325	286
Adjustments/Eliminations
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	128	128	312	461
Net income attributable to Dominion	[1]	0	0	0	0
Eliminations
Segment Reporting Information [Line Items]
Total revenue from external customers	[1]	(137)	(142)	(331)	(269)
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Total revenue from external customers	[2]	1,776	1,813	3,666	3,950
Net income attributable to Dominion		280	246	543	515
Virginia Electric and Power Company | Operating Segments | DVP
Segment Reporting Information [Line Items]
Total revenue from external customers		512	502	1,069	1,069
Net income attributable to Dominion		104	117	222	257
Virginia Electric and Power Company | Operating Segments | Dominion Generation
Segment Reporting Information [Line Items]
Total revenue from external customers		1,264	1,311	2,597	2,896
Net income attributable to Dominion		174	155	340	345
Virginia Electric and Power Company | Operating Segments | Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers		0	0	0	(15)
Net income attributable to Dominion		2	(26)	(19)	(87)
Dominion Gas Holdings, LLC
Segment Reporting Information [Line Items]
Total revenue from external customers	[3]	368	395	799	926
Net income attributable to Dominion		105	85	203	246
Dominion Gas Holdings, LLC | Operating Segments | Dominion Energy
Segment Reporting Information [Line Items]
Total revenue from external customers		368	395	799	926
Net income attributable to Dominion		108	87	211	251
Dominion Gas Holdings, LLC | Operating Segments | Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers		0	0	0	0
Net income attributable to Dominion		$ (3)	$ (2)	$ (8)	$ (5)

[1] 2015 amounts have been recast to reflect nonregulated retail energy marketing operations in the Dominion Energy segment.

[2] See Note 17 for amounts attributable to affiliates.

[3] See Note 17 for amounts attributable to related parties.